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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/10148

Title: Distribution and Redistribution of Water under Sprinkler and Ponded Infiltration in Sandy Soil.
Authors: A. M. Al-Darby
Issue Date: 1991
Abstract: The experiment was carried out on long soil columns of initially air-dry sandy soil. The effect of water application rate (R) and redistribution time after sprinkler infiltration on distribution and redistribution was studied. A fairly uniform water profile was produced and the constant water content (T) was highly correlated with R. It was found that T (fractional volume) equal to the ratio of the application rate (R) to the velocity of the wetting front (V). A quantitative relationships based on Darcy’s law were derived to predict the characteristics of water movement under sprinkler infiltration. The water movement, distribution and redistribution under positive head were also studied for comparison. The irrigated soil layer (20 cm depth) at least has lost 30% and 50% of its water content as downward drainage water at one and 3 days after infiltration, respectively. The results revealed that redistribution profiles have achieved the same uniform water content (at 10 kPa suction) at 3 days after infiltration, regardless of the amount of water applied. It is recommended that sandy soil should be irrigated by low application rate and to a shallow soil depth to minimize the water loss by downward drainage
URI: http://hdl.handle.net/123456789/10148
Appears in Collections:College of Foods And Agricultural Science

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